Display screen or portion thereof with graphical user interface



FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with a graphical user interface showing our new design; and,

FIG. 2 is a front view of a second embodiment of a display screen or portion thereof with a graphical user interface showing our new design.

The outermost set of broken lines and the outer broken line showing of rounded shapes illustrate an electronic device. The broken line showing of all text, symbols, and icons illustrate portions of the graphical user interface. None of the broken lines form part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with graphical user interface, as shown and described. 